摘要:
The control system is intended for steam and/or gas turbines or power plants and monitors predefined operating parameters by means of a corresponding sensor system. In this case, redundant sensors are assigned a sensor-side processor circuit (4) which continuously checks the sensors for erroneous operation and protects or blocks the input side of a central processor arrangement (5) from erroneous signals, and the sensor-side processor circuit (4) only respectively forwards or further processes the signals from a sensor which has been identified as error-free in one channel. This achieves a higher degree of reliability and availability in a single-channel protection system. If necessary, the sensor-side processor circuit can further process the sensor signals to form transformed signals and can thus relieve the central processor arrangement.
摘要:
The invention relates to a method for protecting a gas turbine engine (10), comprising a compressor (11), a combustor (13) and a turbine (12), against high dynamical process values, especially in combustor/flame pulsations. An effective protection against high dynamical process values, especially in combustor/flame pulsations is achieved by providing the steps of o) measuring the pulsations of the combustor (13) with a suitable sensor (18), p) dividing the frequency spectrum of the measured pulsation signal up into pre-defined band pass sections, q) computing the rms (root mean square) of the signal for each band, r) weighting the computed frequency/frequency band rms with predetermined weighting factors, s) cumulating the weighted frequency/frequency band rms values to get a Pulsation Limit Criterion (PLC) value, t) comparing the PLC value with at least one reference value (23), and u) operating the gas turbine engine (10) according to the result of said comparison.
摘要:
Die Erfindung betrifft eine Hochtemperaturlegierung auf Eisenbasis, welche durch folgende chemische Zusammensetzung (Angaben in Gew.-%) gekennzeichnet ist: 20 Cr, 5-6 Al, 4 Ta, 4 Mo, 3-4 Re 0.2 Zr, 0.05 B, 0.1 Y, 0.1 Hf, 0-0.05 C, Rest Fe und herstellungsbedingte Verunreinigungen. Die Legierung ist kostengünstig herstellbar und zeichnet sich gegenüber dem bekannten Stand der Technik durch eine hervorragende Oxidationsbeständigkeit und gute mechanische Eigenschaften bei Temperaturen bis 1200°C aus.
摘要:
A method is provided for measuring the mass flow (M1-Mx) of a stream of a gaseous medium of elevated first temperature (T2) flowing through a specific pipe (F1-Fx), comprising the steps of: a) providing a reference stream of said gaseous medium with a known mass flow (M ref ) and a second temperature (T1) being substantially lower than said first temperature; b) mixing said reference stream with said stream of a gaseous medium of elevated first temperature (T2) flowing through said specific pipe (F1-Fx); c) measuring the resulting temperature (T31-T3x) of the mixture of said reference stream and said stream of a gaseous medium of elevated first temperature (T2) flowing through said specific pipe (F1-Fx); and d) determining the unknown mass flow of said stream of a gaseous medium of elevated first temperature (T2) flowing through said specific pipe (F1-Fx) from the known mass flow (M ref ) of said reference stream, said elevated first temperature (T2), said second temperature (T1) of said reference stream and said measured resulting temperature (T31-T3x) according to the formula: Mx = M ref T 1 - T 3 x T 3 x - T 2 , where Mx is the unknown mass flow, M ref is the known mass flow of said reference stream, T1 is the second temperature, T2 is the elevated first temperature, and T3x is the resulting temperature after mixing.
摘要:
A probe for measuring high frequent pressure oscillations of hot gases that combine redundancy of the output signals with high quality of the output signals.
摘要:
Eine Vorrichtung (20) zur schnellen Messung von Temperaturen in einem Heissgasstrom, insbesondere in einer Gasturbine, ist dadurch gekennzeichnet, dass die Vorrichtung einen Sensor (20) mit zwei flächigen, elektrisch leitenden Heizelementen (21, 22) umfasst, welche auf der Oberfläche eines gemeinsamen, elektrisch isolierenden Sensorkörpers (19) angebracht sind.
摘要:
The invention relates to a method for controlling a gas turbine, operating with an integral fuel reactivity measurement concept. In order to fast determine a safe operation range of the gas turbine with respect to flashback and blow-out, the method comprising deducing the fuel composition and therefore the fuel reactivity by combined measurements of (n-1) physico-chemical properties of a fuel mixture with n>1 fuel components, for deriving the concentration of one component for each physico-chemical property of the fuel gas mixture or for determining of a ratio of said fuels with known compositions and adjusting at least one operation parameter of the gas turbine at least partially based on the determined property of the fuel gas mixture entering the combustors. With the technical solution of the present invention, by way of detecting fast changes in fuel gas, it is assured that the gas turbine may operate with varieties of fuel gas under optimized performance and in safe operation ranges. In actual applications, the present invention may improve flexibility of gas turbines and cost effectiveness of operation of the gas turbines.